Fire-retardant paint



COATING R PLASTIC 1" chloride drier may be added.

Patented Dec. 28, 1926.

UNITED STATES *caslzaa'm;

PATENT OFFICE.

JAMES E. HARRIS, O1 SAN FRANCISCO, CALIFORNIA, ASSIGNOIB 01' ONE-THIRD TO WILLIAI A. CASBIN AND ONE-THIRD TO 'UBSA ABBOTT, BOTH 01 BICHIOND,

CALIFORNIA.

IIBE-BETARDAH T PAINT.

Io Drawing. Application filed April 5,

This invention relates to paints such as used on sh ngle roofs, exterior surfaces, the trim of a building, etc., and particularly to a paint which is fire retardant and highly resistant to sparks and fire'brands when the house is exposed to fire.

The paint is composed of the following m-- gredients: one gallon crude 911; one pound powdered alum one pou'fitlf'carbon tetra tine pound sodium s1l1cate; one poun lithar a four pounds of colorln material, suc as red metallic or the hEe. If a hard su stitutec for the cru e 01 an aint is 'desired," boiled linseedoil is su1 a le n preparing the paint employing the above ingredients, I first mix the wdered alum and lithar e thoroughly. T is when mixed is poure into the crudepil and stirred so as to form a uniform mixture. Theggdium silicate is then added and also stirred ei mixemifi thoroughly. Thereafter, the

cglggiug agent is added. and similarly stirred inmixed, an d finally the ,carhfl imte ill glllil; ride; the carbon tetra-chloride servingas one of the fire retarding agents, and also serving the function of a thinner,.so as to reduce the composition, whimplermits it to be readily. applied to the roof; s ingles, or whatever the case may be.

The hard paint is made in a similar man ner, the onlydifierence being that one gallon of boiled linseed oil is employed as a substitiitefof'the crudeoil, and that a suitable quantity of 'a an drier or any other 'drier is added, the ar paint being prefer-- 1926. Serial no. cases. /52 M ably for the exterior surfaces and trim of a house, while the paint containing the crude oil is particularly adapted to a roof paint. especially when applied to shingles.

The ingredients when thoroughly mixed are applied to the shingles or other surfaces.

to be protected by brush, spraygun, or in any other suitable manner. When dry, it is found to be highly resistant to sparks, fire brands and so on, and as the mixture has a tendency to soak in or penetrate the shingles or wood surface, it renders the same fire stantially as described, to-wit, crude oil,

powdered alum, litharge, carbon tetra-chloride, sodium silicate and a coloring agent.

2. A fire retardant paint as herein described composed of the following ingredien'ts: oil, one gallon; powdered alum, one pound; carbon tetra-chloride, one pound; sodium silicate,'one pound; litharge, onequarter pound; and four pounds of a coloring agent.

' 3. A fire retardant paint composed of the following ingredients: one gallon crude oil; one pound owdered alum; .one pound carbon tetra-c iloride; one pound sodium sili cate; one-quarter pound litharge; and four pounds of a dry coloring agent.

' JAMES E. HARRIS.

' Examiner- 

